Rostock Max V2, stepper motors won't move trying to home.

[SecretObsession]

I finished assembling a Rostock Max v2 and ran into an issue before I started the calibration section of the assembly guide. I'm unable to home the towers. I've tried to "home towers" from the LCD, which just causes the LCD to freeze for about 20-30 seconds, then beeps. The LCD has a message at the bottom which says Failed. Trying to home with MatterControl (controls) also yields no results. (I press the home all button, and it doesn't do anything.) I've tried to pass G28 gcode, but nothing happens.

I've searched the forums and I haven't found anything that had any solution posted with it. There are a few cases that seem similar, but their printers were working at one point.

I'm not sure if it's a configuration problem, I'm not sure what wiring I should be checking since the steppers don't require any assembly. (I'm under the impression that the towers should at least move, even if it's not in the preferred direction.)

I've cleared the eeprom using the example clear_eeprom program in the Audruino IDE.
Compiled and reflashed the Repetier firmware.
Checked End stop functionality.

I'm stuck, any suggestions?

[Dale Eason]

Have you run the end stop test as described in the manual to make sure you have them wired correctly? Sounds to me like they may be connected in reverse so that the board thinks they are already pressed.

Dale

[SecretObsession]

Hi Dale, I reran the end stop test and they seem to be functioning correctly...

Without any end stops pressed.

Code: Select all

->M119

<-ok 0
<-
<-x_max:L y_max:L z_max:L 

X pressed

Code: Select all

->M119

<-ok 0
<-
<-x_max:H y_max:L z_max:L 

Y pressed.

Code: Select all

->M119

<-ok 0
<-
<-x_max:L y_max:H z_max:L 

Z pressed

Code: Select all

<-ok 0
<-
<-x_max:L y_max:L z_max:H 
<-
->M105

[Dale Eason]

Well that looks like the end stops are connected correctly. So now I'm past my level of expertise. Sorry.
Dale

[Earthbound]

Can you adjust Z height from the control panel?

Are the motors free or locked?

[SecretObsession]

Can you adjust Z height from the control panel?

It doesn't physically do anything when I click to raise or lower. (I see the commands being sent, and printer responds with "ok 0")

Are the motors free or locked?

They are free.

[Earthbound]

Check fuse F2. It feeds the motor drivers.

[SecretObsession]

The F2 fuse looks ok. https://i.imgur.com/2OpBq4H.jpg

(I recently swapped the fuse to make sure.)

[KAS]

can you take a picture of the Rambo?

[SecretObsession]

can you take a picture of the Rambo?

Here are few pictures of the rambo, if you need any more or of anything specific, let me know and I'll take more.

http://imgur.com/ATz9eWE
http://imgur.com/bTygePT
http://imgur.com/b7cDYVX
http://imgur.com/iRfoQ1P
http://imgur.com/Si8WNdC

Thanks.

[KAS]

Looks like your stepper connections are reversed. Pin one ( little triangle on the connector) should be on the right of each socket on the Rambo.
Page 194 on the manual is sorta confusing because the different types of steppers the kit can ship with.

Although I would of expected them to still work in reverse, or jerk a little.



Here is how they look on mine.

[SecretObsession]

Looks like your stepper connections are reversed. Pin one ( little triangle on the connector) should be on the right of each socket on the Rambo.
Page 194 on the manual is sorta confusing because the different types of steppers the kit can ship with.

Although I would of expected them to still work in reverse, or jerk a little.



Here is how they look on mine.

20150509_164623.jpg

I flipped the connectors around. Still no joy. I had an extra Rambo board laying around (since I initially thought that was the issue.) and swapped, still no joy. I just don't understand why all 3 are not working, it's surely a symptom within itself.

I think I need to rule out firmware since the problem persists between boards. (It can still be wiring or maybe power, but since all 3 are not working, I'm thinking it's firmware.) I built the firmware from https://github.com/seemecnc/Repetier-091-ROSTOCKMAX using what is currently in master. (Last change in February 16 2015.) Is anyone else running this build?

[Earthbound]

I think it makes sense to start at the basics. Do you have a multimeter of some kind? Verify voltage on each pair of terminals where 12v lands on the RAMBo.

[SecretObsession]

I think it makes sense to start at the basics. Do you have a multimeter of some kind? Verify voltage on each pair of terminals where 12v lands on the RAMBo.

I pulled out my multimeter and checked the pairs. The 3 pairs are each reading 12.01v. (Just as a precation, I had some weird twisting when I bundled the wires, and it left much of the wire exposed. I cleaned them up and got it to where there isn't much bare wire exposed anymore. Retested, no change.)

[SecretObsession]

Thanks everyone! The problem is now resolved. It was correctly identified earlier in the thread by Earthbound. (Reiterated by SeeMeCNC support. Thanks JJ!) The F2 fuse was actually blown. This is the first time I've worked with these fuses and I was just visually inspecting them, which was pretty worthless. (and dumb.) I took the multimeter to it, and sure enough the fuse was dead.

The issue was that the fan had a stray wire making contact with the other soldering point, which was blowing the fuse. I removed the solder and wiring and redid it. Tested for a short and wasn't hearing it anymore. Replaced the F2 fuse, and ran "Home Towers." Success!

Thanks again for the support!

[Eaglezsoar]

Thanks everyone! The problem is now resolved. It was correctly identified earlier in the thread by Earthbound. (Reiterated by SeeMeCNC support. Thanks JJ!) The F2 fuse was actually blown. This is the first time I've worked with these fuses and I was just visually inspecting them, which was pretty worthless. (and dumb.) I took the multimeter to it, and sure enough the fuse was dead.

The issue was that the fan had a stray wire making contact with the other soldering point, which was blowing the fuse. I removed the solder and wiring and redid it. Tested for a short and wasn't hearing it anymore. Replaced the F2 fuse, and ran "Home Towers." Success!

Thanks again for the support!

Glad that you found the problem!
Happy Printing!